Si7459DP-RC

Si7459DP_RC
Vishay Siliconix
R-C Thermal Model Parameters
DESCRIPTION
The parametric values in the R-C thermal model have
been derived using curve-fitting techniques. These
techniques are described in "A Simple Method of
Generating Thermal Models for a Power MOSFET"[1].
When implemented in P-Spice, these values have
matching characteristic curves to the Single Pulse
Transient Thermal Impedance curves for the
MOSFET.
R-C values for the electrical circuit in the Foster/Tank
and Cauer/Filter configurations are included.
Note:
For a detailed explanation of implementing these values in
P-SPICE, refer to Application Note AN609 Thermal Simulations Of
Power MOSFETs on P-SPICE Platform.
R-C THERMAL MODEL FOR TANK CONFIGURATION
R-C VALUES FOR TANK CONFIGURATION
Thermal Resistance (°C/W)
Junction to
Ambient
Case
Foot
RT1
9.2083
73.5297 m
N/A
RT2
1.4903
481.0169 m
N/A
RT3
8.7622
442.7555 m
N/A
RT4
45.5392
502.6979 m
N/A
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CT1
798.5995 m
95.9006 u
N/A
CT2
9.7434 m
32.1985 m
N/A
CT3
61.6872 m
10.4753 m
N/A
CT4
1.5612
35.3560 m
N/A
This document is intended as a SPICE modeling guideline and does not constitute a commercial product data sheet. Designers should refer to the appropriate data
sheet of the same number for guaranteed specification limits.
Document Number: 69223
Revision: 24-Jul-07
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Si7459DP_RC
Vishay Siliconix
R-C THERMAL MODEL FOR FILTER CONFIGURATION
R-C VALUES FOR FILTER CONFIGURATION
Thermal Resistance (°C/W)
Junction to
Ambient
Case
Foot
RF1
6.6273
70.5542 m
N/A
RF2
7.6686
644.8877 m
N/A
RF3
8.2492
259.7859 m
N/A
RF4
42.4549
524.7722 m
N/A
Junction to
Ambient
Case
Foot
CF1
22.4225 m
439.8910 u
N/A
CF2
128.1298 m
5.0258 m
N/A
CF3
252.4112 m
10.1882 m
N/A
CF4
1.1389
67.4933 u
N/A
Thermal Capacitance (Joules/°C)
Note: NA indicates not applicable
Reference:
[1] "A Simple Method of Generating Thermal Models for a Power MOSFET" by Wharton McDaniel and Kandarp Pandya, IEEE / SEMITHERM 2002
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Document Number: 69223
Revision: 24-Jul-07
Si7459DP_RC
Vishay Siliconix
Document Number: 69223
Revision: 24-Jul-07
www.vishay.com
3